Demountable rim and tire.



R. P. SCOTT. I DEMOUNTABLE RIM AND TIRE.

APPLICATION FILED JUNE 15, 1909.

ATTORNEY UNITED STATES PATENT OFFICE ROBER'IL P. SCOTT, OF CADIZ, OHIO.

DEMOTl'NTABIiE RIM AND TI RE.

spevification of Letters Patent. Patnted Nov, 21, 1911,-

Application filed .Tune15, 1909. .Serial No. 502,250.

To all whom itmay concern:

Be itknown that I, ROBERT P. Soon, a-

citizen of the United States, and resident of Cadiz, Harrison county, Ohio, (whose post- 3 ofiice address is Cadiz, Ohio,) have invented a new and useful Improvement in Demou ntable Rims and Tires, of which the following is a specification.

My invention relates to the soealled demountable pneumatic rims and tires where the automobilist carries a spare tire in an inflated condition on a spare wheel mm, which inflated tire and mm may bodily replace the tire and rim on the wheel in caseof a puncture without the necessity of pumping-up on the road.

It has heretofore been proposed to use a wheel rim, which may' be transversely or longitudinally split, or provided with re-' movableflanges, or otherwise arranged to make possible the attachment or detachment of a pneumatic tire, and to slide such rim provided with an inflated tire transversely onto the wheel felly. To make as easy as possible the operation of sliding the rim supplied with a tire onto and off the fell y, the slidingsurfaces have sometimes been coned.- Nevertheless despite this and other expedients to secure ready demountability in this transversely sliding class of rims, it

has been found that the mud and dirt, which gather in the joints, cause parts which are readily movable in the shop to clog and stick on the road and to there seriously interfere with the demounting operation. The

desidera'tum, however, is a road-side and not ,a shop demountabilityi My invention attains roadside demountability by making the rim cylindric and the '10 felly coned so that the rim and felly contact along one edge but are out of contact at the opposite edge. T he clear space thus made between rim and felly I close by an annular band or wedge-ring attached to the rim. In this manner, even though the parts are clogged with mud, a slightblow with a hammer on the rim on the side opposite the clear space between rim and-folly will successfully detach the rim from the felly.

One advantage of my rim is that I may employ the usual radially arranged or inwardly extending valve-stem on the tire which passes through a radial aperture in the folly. For it is seen at once that, with such inwardly egrtendin'g, pr radial valve stem, it will merely be necessary in order to demount the tire, to dislodge the rim from the felly at the point diametrically opposite the valve. This action ispossible because the clear space between rim and felly permitsa turning motion of the plane of the "rim with respect to the plane oft-he wheel about an axis represented by a tangent to the c rcumference of the wheel felly at the point markedby, the valve-stem. But as soon as the rim is free of the felly at the point opposite the valve, the rim with its tire and valve-stem can be liftedoif the wheel felly.

Another feature of my invention consists in arranging matters so that the annular band or wedge-ring on the rim lies-0n that face of the wheel rim which is farthest removed or away from the vehicle which I call the front face. Since any pronounced lateral strain caused by having the vehicle tu'rn corners, which would tend to force the rim from the wheel felly, is toward the vehiele, the wedge-ring thus acts as a rimflange or abutment pressing against the telly-band, preventing motion of the rim on the fell y toward the vehicle, and the consequent dislodgment of the rim.

In order to further secure the wheel rim to the folly in a manner which shall be secure but which will not interfere with ready denumntability, I. provide the wheel rim with an outwardly extending groove or series of outwardly extending grooves or de press-ions, and I provide the wheelfelly with outwardly projecting or'radially arranged serews which take into the depressions. It thus becomes eyldent that it is the work of a moment to loosen the screws.

constructing the rim to secure tire-attachability thereto forms no part of my present.

invention. \Vhethe'r the rim is of the elencher type, or is split, or is supplied with removablefiangs, is immaterial. To illustrate my invention, I have selected the removable flange type of rim.

In the drawings,-Figure 1 shows a cross-.

section of a wheel rim and. tire embodying my invention; and Fig. 2 is a side elevation partlyin section of this wheel rim; I

The coned, 'wooden felly A has secured and thread into the felly band A. The

' wheel will. be placed on the shaft of the vehicle so that the small circular base-of the cone comes to the front. The steel rim B is cylindrical and has a removable flange B held in place by a locking-ring 13*. Since the object of this invention is to secure ready demountability, it will be understood that the fit between the inner cylindrical face of the rim and the larger Qr'rearcircular base of the cone of the felly will not be' a tight or a ground fit but a more or less loose fit. Secured to the inner, front side of the rim B, by riveting or otherwise, is a wedge-ring- B which hides and closes the open joint between the rim and wheel felly at the front,- but which mainly, acts to prevent the wheel rim from being forced off the felly by motion to the right in Fig. 1,

that is by motion toward the vehicle. Since the lateral strains which tend to force the rim from the wheel felly, caused by having the vehicle turn corners, is toward the vehicle, this wedge-ring B in the natural operation of attaching the rim to the wheel while this is in place on the vehicle, comes in the proper position to prevent the rim from being forced from the wheel that 'is it comes on the front side of the wheel. The valve-stem which passes through an aperture in the telly may be of the usual radial type.

A very efiicient manner of holding the band B, which is preferably beveled to form a wedge to the rim, is by rivets passing through slightly elongated transverse slots in the band, which rivets hold the band friction tight to the rim. The .band will be adjusted for standard size rims and fellies at the factory by fastening the rivets, friction tight, to'fix the band B inproper position. If, however, there is a variation from standard, due to faulty manufacture, it will be easy to tap the band B towardor away from the felly with a-hammer and if necessary to further tighten the rivets. So, too, it will be easy to save one or two screws by using pins on the rims entering apertures in the follies. These pins may be tapered and must not be placed far enough apart to prevent the rim with its valve stem and pins from being lifted, radially away from the felly. 4'

The operation will now be clear.

In order to attach the tire to the rim, it

is merely necessary to remove the split locking-ring B and the removable. rim-flange B. The tire, which in the case shown is of the inextensible edge type, is now placed on the rim the rim-flange B is put in p os1 tion, the locking-ring B is s rung into place, and the tire is inflated. e now have a spare rim and inflated tire which may be H carried on the vehicle its journey.

before stated, other means thanthea'emow 'able flange B .and the locking-ring ma' be adopted to secure ready attachabihty o the tire to the rim.

Should oneof the tires of the vehicle become deflated, the screws A of the rim on the veh cle are, quickly operated torelease them from contact with the outwardly extending depressions of the wheel rim.; Because of the pronounced coning of the felly, rendered possible by the flange B, the rim readily comes oflf the felly at the point op posite the valve stem. The part of the rim carrying the va1ve-stem,'which may be of the usual inwardly extending type, fnay now be li-ftedout of its aperture in the wheel felly, which is thereupon in condition to have placed thereon the spare rim and m- 'fiated tire by an operation the reverseof that described.

I claim,

1. A demountable rim and wheel structure comprisin a coned wheel felly, a plain, frusto-conica'l and embracing the felly, a cyl-indricaLwheel rim carrying a removable, pneumatic tire'fitted to slide over the larger .base of the frusto-cone but' forming a clear space at the smaller base, and securing devices for preventing-lateral displacement of the rim and felly,-substantially as described.

2. A. demountable r-ixn'and wheel structure comprising a coned wheel felly, a? plain, frusto-conical band embracing the felly, a cylindrical wheel rim carrying a removable pneumatic tire fitted to slide overthe larger base of the frusto-cone, and a wedge-ring secured to the inner face of the rim bearing against the felly-band to close the open joint between the rim and felly, substantially as described. l

3. A .demountable rim and wheel structure comprising a coned wheel felly; a plain, frusto-conical band embracing thefelly; 'a cylindrical wheel rim, provided with depres- 510118, carrying-a removable pneumatic tire I sliding over thelarger base of the frustothe rim and felly; and outwardly projecting.

screws in the wheel felly engagingwith the rim depressions, substantially as described.

4. A demountabl'e rim and wheel stfucture comprisin a coned wheel felly,'a plain,

frusto-conical and embracing the felly, a cylindrical wheel rim carrying af-removable neumatic tire fitted to slide over the larger name to this specification in the presence of base of the frusto-cone, and a wedge-ring two subscribing witnesses.

secured to the inner face of the rim bearlng 1 against the felly-band along a circumfer- ROBERT P. SCOTT;

5 ential line to close the open joint between the 'Witnesses:

rim and felly, substantially as described. JOHN B. SMITH,

In testimony whereof I have signed my N. LETZLEFF. 

